Display panel and display device

Abstract

The invention discloses a display panel, a manufacturing method thereof and a display device, and belongs to the technical field of display. The display panel comprises a driving backboard, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer. Wherein the pixel definition layer is provided with a plurality of pixel holes, and the side walls of the pixel holes are provided with concave structures. As the flatness of the side, away from the driving back plate, of the filling layer is relatively high, the concave structures are distributed on the side, away from the driving back plate, of the filling layer, it is guaranteed that the distribution positions of the concave structures are basically consistent, and it is guaranteed that the partition effects of the concave structures on the organic light-emitting layer are basically consistent. In this way, at least part of the orthographic projection of the concave structure on the driving backboard does not coincide with the orthographic projection of the first electrode on the driving backboard. Thus, the area, covered by the concave structure, in the first electrode is small, the connection area of the first electrode and the organic light-emitting layer is increased, the aperture ratio of the display panel is effectively improved, and the display effect of the display panel is good.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panels are widely used in the display field due to their advantages such as thin thickness, self-luminescence, high resolution and fast response speed.

[0003] OLED display panels generally include: a driving backplane, and a plurality of light-emitting devices located on the driving backplane. The light-emitting devices include: an anode, a light-emitting layer, and a cathode layer stacked in a direction away from the driving backplane. Among them, the light-emitting layers in each light-emitting device are uniformly formed by evaporation through an evaporation process, that is, the light-emitting layers in each light-emitting device are connected together. In order to prevent the lateral leakage current generated by the light-emitting layer in a certain light-emitting device from causing the adjacent light-emitting device to emit light during the light-emitting process of the light-emitting device, a pixel definition layer distributed between adjacent light-emitting devices is required. The lateral leakage current can be blocked by a concave structure provided on the side of the pixel definition layer close to the light-emitting device.

[0004] However, in order to ensure that the concave structure of the pixel definition layer has a better effect of isolating the light-emitting layer, the pixel definition layer with the concave structure needs to be made above a relatively flat and uniform anode. Therefore, the portion of the pixel definition layer with the concave structure will cover the edge of the anode, resulting in a smaller aperture ratio of the OLED display panel, and further resulting in a poor display effect of the display panel. Summary of the invention

[0005] The embodiment of the present application provides a display panel and a display device thereof, which can solve the problem of poor display effect of the OLED display panel in the prior art, and the technical solution is as follows:

[0006] In one aspect, a display panel is provided, comprising: a driving backplane, a first electrode layer, a filling layer, a pixel definition layer, an organic light emitting layer and a second electrode layer;

[0007] The first electrode layer is located at one side of the driving backplane, and the first electrode layer has a plurality of first electrodes that are separately arranged, and the first electrodes are electrically connected to the driving backplane;

[0008] The filling layer is located at a side of the driving backplane where the first electrode layer is disposed, and is distributed between two adjacent first electrodes;

[0009] The pixel definition layer is located on a side of the filling layer away from the driving backplane, the pixel definition layer has a plurality of pixel openings, and the sidewalls of the pixel openings have a concave structure;

[0010] The organic light emitting layer is located on a side of the pixel definition layer away from the driving backplane;

[0011] The second electrode layer is located on a side of the organic light emitting layer away from the driving backplane;

[0012] Among them, the distance between the side of the filling layer facing away from the driving backplane and the driving backplane is greater than or equal to the distance between the side of the first electrode layer facing away from the driving backplane and the driving backplane; the orthographic projection of the concave structure on the driving backplane overlaps with the orthographic projection of the filling layer on the driving backplane, and the orthographic projection of the concave structure on the driving backplane is at least outside the orthographic projection of the first electrode on the driving backplane.

[0013] Optionally, the driving backplane has a groove on a side facing the first electrode layer, the groove is distributed between the orthographic projections of two adjacent first electrodes on the driving backplane, and the groove includes at least two first sub-grooves and second sub-grooves distributed in different areas, and the depth of the first sub-groove is greater than the depth of the second sub-groove;

[0014] The distance between the side of the filling layer away from the driving back plate and the bottom surface of the first sub-groove is greater than the distance between the side of the filling layer away from the driving back plate and the bottom surface of the second sub-groove.

[0015] Optionally, for any first electrode, a side of the filling layer distributed around the first electrode facing away from the driving back plate is flush, and a side of the filling layer facing away from the driving back plate is a plane parallel to the driving back plate.

[0016] Optionally, an orthographic projection of the concave structure on the driving backplane does not overlap with an orthographic projection of the first electrode on the driving backplane.

[0017] Optionally, when the distance between the side of the filling layer facing away from the driving backplane and the driving backplane is greater than the distance between the side of the first electrode layer facing away from the driving backplane and the driving backplane, the filling layer covers the edge portion of the first electrode, and the orthographic projection of the pixel definition layer on the driving backplane is located within the orthographic projection of the filling layer on the driving backplane.

[0018] Optionally, an outer boundary of an orthographic projection of the pixel definition layer on the driving backplane does not overlap with an outer boundary of an orthographic projection of the filling layer on the driving backplane.

[0019] Optionally, an orthographic projection of the pixel definition layer on the driving backplane does not overlap with an orthographic projection of the first electrode on the driving backplane.

[0020] Optionally, the driving backplane has an insulating layer on a side facing the first electrode layer, the insulating layer has the groove and a plurality of through holes corresponding to the plurality of first electrodes, and the first electrodes are electrically connected to the driving backplane through the corresponding through holes.

[0021] Optionally, the pixel definition layer includes a first definition layer and a second definition layer stacked in a direction perpendicular to and away from the drive substrate, and the pixel opening sequentially penetrates the second definition layer and the first definition layer;

[0022] Among them, the orthographic projection of the first definition layer on the driving backplane is located within the orthographic projection of the second definition layer on the driving backplane, and the outer boundary of the orthographic projection of the first definition layer on the driving backplane does not overlap with the outer boundary of the orthographic projection of the second definition layer on the driving backplane.

[0023] Optionally, a surface of the first definition layer facing away from the driving back plate and a surface of the second definition layer facing away from the driving back plate are both parallel to a plane of the driving back plate.

[0024] Optionally, the pixel definition layer further includes: a third definition layer, the third definition layer is located on a side of the first definition layer facing the driving backplane, and the pixel opening also penetrates the third definition layer;

[0025] Among them, the orthographic projection of the first definition layer on the driving backplane is located within the orthographic projection of the third definition layer on the driving backplane, and the outer boundary of the orthographic projection of the first definition layer on the driving backplane does not overlap with the outer boundary of the orthographic projection of the third definition layer on the driving backplane.

[0026] Optionally, an orthographic projection of the third definition layer on the driving backplane does not overlap with an orthographic projection of the first electrode on the driving backplane.

[0027] Optionally, in a direction parallel to the driving backplane, a width of a portion of the third definition layer protruding outward relative to the first definition layer is greater than or equal to a width of a portion of the second definition layer protruding outward relative to the first definition layer.

[0028] Optionally, a surface of the third definition layer facing away from the driving back plate is a plane parallel to the driving back plate.

[0029] On the other hand, a display device is provided, comprising: a driving chip and a display panel, wherein the display panel is any one of the display panels described above, and the driving chip is used to apply a driving signal to the display panel.

[0030] The technical solution provided by the embodiment of the present application has at least the following beneficial effects:

[0031] The display panel includes: a driving backplane, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer, and a second electrode layer. The pixel definition layer has a plurality of pixel openings and the sidewalls of the pixel openings have a concave structure. The distance between the side of the filling layer away from the driving backplane and the driving backplane is greater than or equal to the distance between the side of the first electrode layer away from the driving backplane and the driving backplane, so as to ensure that the flatness of the side of the filling layer away from the driving backplane is relatively high. To this end, the concave structure is distributed on the side of the filling layer away from the driving backplane, so that the distribution positions of the concave structures distributed on the sidewalls of each pixel opening are basically consistent, so as to ensure that the concave structures set on the sidewalls of each pixel opening have basically consistent partitioning effects on the organic light-emitting layer. In this way, at least part of the orthographic projection of the concave structure on the driving backplane may not overlap with the orthographic projection of the first electrode on the driving backplane, that is, at least part of the orthographic projection of the concave structure on the driving backplane is located outside the orthographic projection of the first electrode on the driving backplane. Thus, the area of ​​the first electrode covered by the concave structure on the side wall of the pixel opening is smaller, so that the connection area between the first electrode and the organic light-emitting layer is increased, which can effectively improve the aperture ratio of the display panel and thus improve the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is a schematic diagram of a partial structure of a display panel;

[0034] Figure 2 is a top view of a display panel provided in an embodiment of the present application;

[0035] Figure 3 yes Figure 2 A schematic cross-sectional view of a display panel at AA' is shown;

[0036] Figure 4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application;

[0037] Figure 5 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0038] Figure 6 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0039] Figure 7 is a schematic diagram of forming a photoresist on one side of an insulating layer provided by an embodiment of the present application;

[0040] Figure 8 is a schematic diagram of a patterned photoresist provided in an embodiment of the present application;

[0041] Fig. 9 is a schematic diagram of forming a first electrode on one side of a patterned photoresist provided by an embodiment of the present application;

[0042] Fig.10 is a schematic diagram of stripping a patterned photoresist provided in an embodiment of the present application;

[0043] Fig.11 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0044] Fig.12 is a partial cross-sectional schematic diagram of a display panel provided by another embodiment of the present application;

[0045] Fig.13 It is a partial cross-sectional schematic diagram of another display panel provided by another embodiment of the present application. DETAILED DESCRIPTION

[0046] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] In the related art, a silicon-based OLED display panel may include: a driving backplane, and a plurality of light-emitting devices located on the driving backplane. Each light-emitting device includes: a first electrode, a light-emitting layer, and a second electrode. Among them, the light-emitting layer is composed of at least one sub-light-emitting layer. Each sub-light-emitting layer may include: a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer arranged in a stacked manner. In the case where the light-emitting layer is composed of a plurality of stacked sub-light-emitting layers, each sub-light-emitting layer is connected in series through a charge generation layer. In this way, the color of the light emitted by the light-emitting layer is determined by the plurality of sub-light-emitting layers. For example, if the light-emitting layer needs to emit white light, a sub-light-emitting layer capable of emitting red light, a sub-light-emitting layer capable of emitting green light, and a sub-light-emitting layer capable of emitting blue light may be stacked so that the light-emitting layer emits white light. Alternatively, a sub-light-emitting layer capable of emitting yellow light and a sub-light-emitting layer capable of emitting blue light may be stacked so that the light-emitting layer emits white light.

[0049] Wherein, the first electrode is electrically connected to the driving backplane. When a voltage is applied to the first electrode, an electric field is formed between the first electrode and the second electrode. In this way, the hole injection layer can inject holes into the hole transport layer, and the holes are transmitted to the light-emitting material layer through the hole transport layer. The electron injection layer can inject electrons into the electron transport layer, and the electrons are transmitted to the light-emitting material layer through the electron transport layer. The holes and electrons combine with high-energy excitons in the light-emitting material layer, and the high-energy excitons are unstable and can easily transition to low-energy excitons and release energy. When releasing energy, photons are generated to emit light with a wavelength within a certain range. In the case where the light-emitting layer is composed of multiple sub-light-emitting layers, the charge generation layer is usually made of a material with good conductivity so that each sub-light-emitting layer can emit light, thereby making the light-emitting effect of the light-emitting layer better.

[0050] Since the light-emitting layers in each light-emitting device are uniformly formed by evaporation process, that is, the light-emitting layers in each light-emitting device are connected together. In order to prevent the lateral leakage current generated by the charge generation layer in a light-emitting device from causing the adjacent light-emitting device to emit light during the light-emitting process of a certain light-emitting device, a pixel definition layer is required between adjacent light-emitting devices, and a groove is provided on the side of the pixel definition layer to isolate the charge generation layer, thereby isolating the lateral leakage current. A filling layer is also provided on the side of the pixel definition layer close to the driving backplane to reduce the overall step difference of the pixel definition layer.

[0051] In the process of manufacturing the display panel, in order to ensure that two adjacent first electrodes are not connected, it is usually necessary to increase the etching time to completely remove the portion distributed between the two adjacent first electrodes, but this also increases the problem of over-etching. Usually, because the concentration of the etching solution distributed in different areas of the display panel is different, the over-etching depth generated in different areas after the over-etching process will be different.

[0052] For this reason, Figure 1 As shown, in the process of forming the first electrode layer 200 in the display panel 000, after the portion between two adjacent first electrodes 210 is overetched, the insulating layer 110 located on the side of the driving backplane 100 facing the first electrode layer 200 is also etched to form a groove O on the side of the insulating layer 110 facing the first electrode layer 200. Since the concentrations of the etching solutions distributed in different regions are different during the overetching process, the depths of the grooves O formed on the insulating layer 110 in different regions are different. In addition, since the side of the filling layer 300 formed between the two adjacent first electrodes 210 facing away from the driving backplane 100 usually does not protrude from the side of the first electrode layer 200 facing away from the driving backplane 100, the distances between the side of the filling layer 300 facing away from the driving backplane 100 and the side of the first electrode layer 200 facing away from the driving backplane 100 in different regions are different.

[0053] Generally, in order to ensure that the concave structure N of the pixel definition layer 400 has a better effect of isolating the light-emitting layer, the pixel definition layer 400 having the concave structure N needs to be made above the relatively flat and uniform first electrode 210. Therefore, the portion of the pixel definition layer 400 provided with the concave structure N will cover the edge portion of the first electrode 210, that is, the orthographic projection of the concave structure N on the driving backplane 100 is located within the orthographic projection of the first electrode 210 on the driving backplane 100. In this case, the distribution positions of the concave structures N provided on the side walls of each pixel opening K in the pixel definition layer 400 are the same, so as to ensure that the concave structures N provided on the side walls of each pixel opening K have the same effect of isolating the organic light-emitting layer 500. However, after the edge portion of the first electrode 210 is covered by the concave structure N of the pixel definition layer 400, the area where the first electrode 210 is connected to the organic light-emitting layer 500 will be reduced, thereby resulting in a smaller aperture ratio of the display panel, which will affect the display effect of the display panel 000.

[0054] It should be noted that the aperture ratio of the display panel refers to the ratio of the area where the first electrode 210 is connected to the organic light-emitting layer 500 to the area of ​​the orthographic projection of the first electrode 210 on the driving backplane 100. After a voltage is applied to the first electrode 210, the portion where the organic light-emitting layer 500 is connected to the first electrode 210 can emit light, so the size of the area where the first electrode 210 is connected to the organic light-emitting layer 500 will affect the display effect of the display panel.

[0055] In order to solve the above technical problems, the present application provides a display panel. Figure 2 and Figure 3 , Figure 2 is a top view of a display panel provided in an embodiment of the present application, Figure 3 yes Figure 2 The cross-sectional view of the display panel at AA′ is shown. The display panel 000 may include: a driving backplane 100 , a first electrode layer 200 , a filling layer 300 , a pixel definition layer 400 , an organic light emitting layer 500 and a second electrode layer 600 .

[0056] The first electrode layer 200 in the display panel 000 is located at one side of the driving backplane 100 . The first electrode layer 200 has a plurality of first electrodes 210 that are separately arranged. The first electrodes 210 are electrically connected to the driving backplane 200 .

[0057] The filling layer 300 in the display panel 000 is located at a side of the driving backplane 100 where the first electrode layer 200 is disposed, and is distributed between two adjacent first electrodes 210 .

[0058] The pixel definition layer 400 in the display panel 000 is located on the side of the filling layer 300 away from the driving backplane 100, and the pixel definition layer 400 has a plurality of pixel openings K corresponding one to one to the plurality of first electrodes 210. The orthographic projection of the pixel opening K on the driving backplane 100 is located within the orthographic projection of the corresponding first electrode 210 on the driving backplane 100, and the side wall of the pixel opening K has a concave structure N, that is, the pixel definition layer 400 has a concave structure N.

[0059] The organic light-emitting layer 500 in the display panel 000 is located on the side of the pixel definition layer 400 away from the driving backplane 100. The organic light-emitting layer 400 can be composed of multiple layers of organic material layers stacked, and these organic material layers can include at least one sub-light-emitting layer. Each sub-light-emitting layer includes: a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer and an electron injection layer stacked in a direction vertically and away from the driving backplane 100. In the case where the multi-layer organic material layer includes multiple sub-light-emitting layers, each sub-light-emitting layer is connected in series through a charge generation layer. The concave structure N can isolate at least part of the organic material layer in the organic light-emitting layer 500. For example, the concave structure N can isolate the charge generation layer in the organic light-emitting layer 400, and then isolate the lateral leakage current. Of course, the hole injection layer, hole transport layer, light-emitting material layer, electron transport layer and electron injection layer in the organic light-emitting layer 400 may also be isolated by the concave structure N.

[0060] The second electrode layer 600 in the display panel 000 is located on a side of the organic light emitting layer 500 away from the driving backplane 100 .

[0061] It should be noted that the portion of the organic light-emitting layer 500 distributed in each pixel opening K may be in contact with the corresponding first electrode 210. In this case, for any pixel opening K, the first electrode 210 corresponding to the pixel opening K, and the portions of the organic light-emitting layer 500 and the second electrode layer 600 distributed in the pixel opening K may constitute a light-emitting device.

[0062] It should also be noted that, in order to ensure that the concave structure N has a better effect of blocking the lateral leakage current, the concave structure N provided on the side wall of each pixel opening K may be ring-shaped. That is, for any pixel opening K, a circle of concave structures N will be provided on the side wall of the pixel opening K, thereby ensuring that the lateral leakage current generated in any direction during the light-emitting process of a certain light-emitting device will be blocked by the circle of concave structures N provided on the side wall of the pixel opening K where the light-emitting device is located.

[0063] In the present application, the distance between the driving backplane 100 and the side of the filling layer 300 facing away from the driving backplane 100 is greater than or equal to the distance between the driving backplane 100 and the side of the first electrode layer 200 facing away from the driving backplane 100 .

[0064] Here, in the case where the distance between the side of the filling layer 300 facing away from the driving back plate 100 and the driving back plate 100 is equal to the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, the side of the filling layer 300 facing away from the driving back plate may be flush with the side of the first electrode layer 400 facing away from the driving back plate 100. In the case where the distance between the side of the filling layer 300 facing away from the driving back plate 100 and the driving back plate 100 is greater than the distance between the side of the first electrode layer 200 facing away from the driving back plate 100 and the driving back plate 100, the side of the filling layer 300 facing away from the driving back plate may protrude from the side of the first electrode layer 400 facing away from the driving back plate 100.

[0065] In order to more clearly see the shape of the concave structure N set on the side wall of the pixel opening K, please refer to Figure 4 , Figure 4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application, Figure 4The display panel shown does not show the organic light-emitting layer 400 and the second electrode layer 500. When the distance between the side of the filling layer 300 away from the driving backplane 100 and the driving backplane 100 is greater than or equal to the distance between the side of the first electrode layer 200 away from the driving backplane 100 and the driving backplane 100, it can be ensured that the flatness of the side of the filling layer 300 away from the driving backplane 100 is relatively high. For this reason, even if the concave structure N on the side wall of the pixel opening K is distributed on the side of the filling layer 300 away from the driving backplane 100, that is, the orthographic projection of the concave structure N on the driving backplane 100 overlaps with the orthographic projection of the filling layer 300 on the driving backplane 100, it can also be ensured that the distribution positions of the concave structures N distributed on the side walls of each pixel opening K are basically consistent, so as to ensure that the concave structures N set on the side walls of each pixel opening K have basically consistent partitioning effects on the organic light-emitting layer 500. In this way, at least part of the orthographic projection of the concave structure N on the driving backplane 100 may not overlap with the orthographic projection of the first electrode 210 on the driving backplane 100, that is, at least part of the orthographic projection of the concave structure N on the driving backplane 100 is located outside the orthographic projection of the first electrode 210 on the driving backplane 100. In this way, the area of ​​the first electrode 210 covered by the concave structure N on the side wall of the pixel opening K is small, so that the connection area between the first electrode 210 and the organic light-emitting layer 500 is increased, which can effectively improve the aperture ratio of the display panel 000, thereby making the display effect of the display panel 000 better.

[0066] In summary, the display panel provided by the embodiment of the present application includes: a driving backplane, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer. Among them, the pixel definition layer has a plurality of pixel openings and the sidewalls of the pixel openings have a concave structure. The distance between the side of the filling layer away from the driving backplane and the driving backplane is greater than or equal to the distance between the side of the first electrode layer away from the driving backplane and the driving backplane, ensuring that the flatness of the side of the filling layer away from the driving backplane is relatively high. To this end, the concave structure is distributed on the side of the filling layer away from the driving backplane, which can ensure that the distribution positions of the concave structures distributed on the sidewalls of each pixel opening are basically consistent, so as to ensure that the concave structures set on the sidewalls of each pixel opening have basically the same partition effect on the organic light-emitting layer. In this way, at least part of the orthographic projection of the concave structure on the driving backplane may not overlap with the orthographic projection of the first electrode on the driving backplane, that is, at least part of the orthographic projection of the concave structure on the driving backplane is located outside the orthographic projection of the first electrode on the driving backplane. Thus, the area of ​​the first electrode covered by the concave structure on the side wall of the pixel opening is smaller, so that the connection area between the first electrode and the organic light-emitting layer is increased, which can effectively improve the aperture ratio of the display panel and thus improve the display effect of the display panel.

[0067] In the present application, the driving backplane 100 has a groove O on one side facing the first electrode layer 200, and the filling layer 300 can be located in the groove O on one side facing the driving backplane 100. The groove O is distributed between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100, and the groove O includes at least two first sub-grooves O1 and second sub-grooves O2 distributed in different areas, and the depth of the first sub-groove O1 is greater than the depth of the second sub-groove O2.

[0068] For example, Figure 4 As shown, due to the different concentrations of the etching solution distributed in different areas during the over-etching process, the depths of the first sub-groove O1 distributed on one side of the first electrode 210 and the second sub-groove O2 distributed on the other side of the first electrode 210 are different, and the depth d1 of the first sub-groove O1 is greater than the depth d2 of the second sub-groove O2. In this case, the distance D1 between the side of the filling layer 300 away from the driving back plate 100 and the bottom surface of the first sub-groove O1 can be greater than the distance D2 between the side of the filling layer 300 away from the driving back plate 100 and the bottom surface of the second sub-groove O2.

[0069] Exemplarily, for any first electrode 210, the side of the filling layer 300 distributed around the first electrode 210 facing away from the driving backplane 100 is flush, and the side of the filling layer 300 facing away from the driving backplane 100 is a plane parallel to the driving backplane 100. In this case, the flatness of the side of the filling layer 300 facing away from the driving backplane 100 can be further improved, so that even if the positive projection of the concave structure N on the side wall of each pixel opening K on the driving backplane 100 exceeds the outer boundary of the positive projection of the corresponding first electrode 210 on the driving backplane 100, it can be ensured that the distribution position of the concave structure N on the side wall of each pixel opening K is completely consistent, and further it can be ensured that the concave structure N set on the side wall of each pixel opening K has a substantially consistent partition effect on the organic light-emitting layer 500.

[0070] In the present application, when the distance between the side of the filling layer 300 facing away from the driving backplane 100 and the driving backplane 100 is equal to the distance between the side of the first electrode layer 200 facing away from the driving backplane 100 and the driving backplane 100, that is, when the side of the filling layer 300 facing away from the driving backplane 100 is flush with the side of the first electrode layer 200 facing away from the driving backplane, the pixel definition layer 400 needs to cover the edge portion of each first electrode 210 to prevent the etching marks generated on the edge of the first electrode 210 after etching from interfering with the normal light emission of the light-emitting device 200.

[0071] In this case, a portion of the orthographic projection of the concave structure N of the pixel definition layer 400 on the driving backplane 100 may be located within the orthographic projection of the first electrode 210 on the driving backplane 100; another portion may be located outside the orthographic projection of the first electrode 210 on the driving backplane 100, and it may be located within the orthographic projection of the filling layer 300 on the driving backplane 100.

[0072] In the present application, when the distance between the side of the filling layer 300 facing away from the driving backplane 100 and the driving backplane 100 is greater than the distance between the side of the first electrode layer 200 facing away from the driving backplane 100 and the driving backplane 100, that is, when the side of the filling layer 300 facing away from the driving backplane 100 protrudes beyond the side of the first electrode layer 200 facing away from the driving backplane, in order to ensure that the step difference inside the pixel definition layer 400 is small, it is necessary to make the orthographic projection of the pixel definition layer 400 on the driving backplane 100 located within the orthographic projection of the filling layer 300 on the driving backplane 100.

[0073] In this case, the edge of each first electrode 210 needs to be covered with a filling layer 300. That is, the filling layer 300 can cover the edge of the first electrode 210 to prevent the etching marks generated on the edge of the first electrode 210 after etching from interfering with the normal light emission of the light emitting device.

[0074] Here, in order to further increase the aperture ratio of the display panel 000, the orthographic projection of the pixel definition layer 400 on the driving backplane 100 can be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. That is, the orthographic projection of the pixel definition layer 400 on the driving backplane 100 is all distributed in the area where the groove O is located. In this case, the orthographic projection of the concave structure N of the pixel definition layer 400 on the driving backplane 100 is all distributed in the area where the groove O is located, that is, the orthographic projection of the concave structure N on the driving backplane 100 can be located outside the orthographic projection of the first electrode 210 on the driving backplane 100. In this way, the width of the first electrode 210 covered by the filling layer 300 can be reduced on the premise of ensuring that the portion of the pixel definition layer 400 having the concave structure N is located on the filling layer 300 with higher flatness, thereby increasing the aperture ratio of the first electrode 210, so that the display effect of the display panel 000 is better. Exemplarily, the width of the edge portion of the first electrode 210 covered by the filling layer 300 is less than or equal to 0.4 microns.

[0075] In the embodiment of the present application, in order to ensure that the concave structure N in the pixel definition layer 400 has a certain partitioning effect, the pixel definition layer 400 may be composed of two or more layers of inorganic insulating layers stacked. For example, the pixel definition layer 400 in the display panel 000 may include two layers of inorganic insulating layers or three layers of inorganic insulating layers. Of course, it may also include more layers of inorganic insulating layers, which is not limited in the embodiment of the present application.

[0076] In the case where the pixel definition layer 400 includes two inorganic insulating layers, as shown in FIG. Figure 5 As shown, Figure 5 4 is a partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present application. The two inorganic insulating layers may be respectively: a first definition layer 410 and a second definition layer 420. The second definition layer 420 may be located on the side of the first definition layer 410 away from the driving backplane 100. That is, the pixel definition layer 400 may include a first definition layer 410 and a second definition layer 420 stacked in a direction vertically away from the driving substrate 100, and the pixel opening K sequentially penetrates the second definition layer 420 and the first definition layer 410. Among them, the orthographic projection of the first definition layer 410 on the driving backplane 100 is located within the orthographic projection of the second definition layer 420 on the driving backplane 100, and the outer boundary of the orthographic projection of the first definition layer 410 on the driving backplane 100 does not overlap with the outer boundary of the orthographic projection of the second definition layer 420 on the driving backplane 100. That is, in a direction parallel to the driving backplate 100 , the second definition layer 420 protrudes outward relative to the first definition layer 410 , and the width of the protruding portion of the second definition layer 420 relative to the first definition layer 410 is greater than or equal to 0.05 micrometers.

[0077] Here, in a direction parallel to the driving backplane 100, the portion of the second definition layer 420 protruding outward relative to the first definition layer 410 and the side surface of the first definition layer 410 facing the pixel opening K can form a concave structure N. When the width of the portion of the second definition layer 420 protruding outward relative to the first definition layer 410 is greater than or equal to 0.05 microns, the concave structure N can have a better ability of lateral leakage current.

[0078] Since the side of the filling layer 300 facing away from the driving backplane 100 is a plane parallel to the driving backplane 100, and the orthographic projection of the pixel definition layer 400 on the driving backplane 100 is located within the orthographic projection of the filling layer 300 on the driving backplane 100. Therefore, after the pixel definition layer 400 is formed on the side of the filling layer 300 facing away from the driving backplane 100, it can be ensured that the side of the first definition layer 410 facing away from the driving backplane 100 and the side of the second definition layer 420 facing away from the driving backplane 100 are both planes parallel to the driving backplane 100. For this reason, in the direction perpendicular to the driving backplane, the thickness at each position in the first definition layer 410 is the same, and the thickness at each position in the second definition layer 420 is the same. In this way, it is ensured that the concave structure N of the pixel definition layer 400 has the same effect of isolating the organic light-emitting layer 500.

[0079] In addition, when the pixel definition layer 400 only includes the first definition layer 410 and the second definition layer 420, the portion of the second electrode layer 600 located within the pixel opening K is relatively flat, so as to ensure that the overall step difference of the portion of the second electrode layer 600 distributed within the pixel opening K is relatively small, thereby reducing the probability of the second electrode layer 600 being disconnected.

[0080] In the case where the pixel definition layer 400 includes three inorganic insulating layers, please refer to Figure 6 , Figure 6 It is a partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present application. The three inorganic insulating layers may be respectively: a first definition layer 410, a second definition layer 420 and a third definition layer 430. The third definition layer 430 is located on the side of the first definition layer 410 facing the driving backplane 100, and the pixel opening K also penetrates the third definition layer 430. The orthographic projection of the first definition layer 410 on the driving backplane 100 is located within the orthographic projection of the third definition layer 430 on the driving backplane 100, and the outer boundary of the orthographic projection of the first definition layer 410 on the driving backplane 100 does not overlap with the outer boundary of the orthographic projection of the third definition layer 430 on the driving backplane 100. That is, in a direction parallel to the driving backplane 100, the second definition layer 420 protrudes outward relative to the first definition layer 410, and the width of the portion of the second definition layer 420 protruding outward relative to the first definition layer 410 is greater than or equal to 0.05 microns; the third definition layer 430 protrudes outward relative to the first definition layer 410, and the width of the portion of the third definition layer 430 protruding outward relative to the first definition layer 410 is greater than or equal to 0.05 microns. In addition, in a direction parallel to the driving backplane 100, the width of the portion of the third definition layer 430 protruding outward relative to the first definition layer 410 is greater than or equal to the width of the portion of the second definition layer 420 protruding outward relative to the first definition layer 410.

[0081] Here, in a direction parallel to the driving backplane 100, the portion of the second definition layer 420 protruding outward relative to the first definition layer 410, the portion of the third definition layer 430 protruding outward relative to the first definition layer 410, and the side surface of the first definition layer 410 facing the pixel opening K can enclose a concave structure N. When the width of the portion of the second definition layer 420 protruding outward relative to the first definition layer 410 is greater than or equal to 0.05 microns, and the width of the portion of the third definition layer 430 protruding outward relative to the first definition layer 410 is greater than or equal to 0.05 microns, the concave structure N can have a better ability of lateral leakage current.

[0082] It should be noted that, since the side of the filling layer 300 facing away from the driving backplane 100 is a plane parallel to the driving backplane 100, and the orthographic projection of the pixel definition layer 400 on the driving backplane 100 is located within the orthographic projection of the filling layer 300 on the driving backplane 100, after the pixel definition layer 400 is formed on the side of the filling layer 300 facing away from the driving backplane 100, it can be ensured that the side of the third definition layer 430 facing away from the driving backplane 100, the side of the first definition layer 410 facing away from the driving backplane 100, and the side of the second definition layer 420 facing away from the driving backplane 100 are all planes parallel to the driving backplane 100. For this reason, in the direction perpendicular to the driving backplane, the thickness at each position in the first definition layer 410 is the same, the thickness at each position in the third definition layer 430 is the same, and the thickness at each position in the second definition layer 420 is the same. In this way, it is ensured that the distribution positions of the concave structures N in each pixel opening K in the pixel definition layer 400 are the same, so that the effects of blocking the lateral leakage current by the concave structures N in each pixel opening K are the same.

[0083] It should also be noted that, according to the above analysis, in order to further increase the aperture ratio of the display panel 000, the orthographic projection of the pixel definition layer 400 on the driving backplane 100 needs to be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. That is, it is necessary to make the orthographic projection of the pixel definition layer 400 on the driving backplane 100 not overlap with the first electrode 210. To this end, the orthographic projection of the third definition layer 430 in the pixel definition layer 400 on the driving backplane 100 does not overlap with the orthographic projection of the first electrode 210 on the driving backplane 100. Moreover, since the filling layer 300 needs to cover the edge portion of the first electrode 210, the outer boundary of the orthographic projection of the pixel definition layer 400 on the driving backplane 100 does not overlap with the outer boundary of the orthographic projection of the filling layer 300 on the driving backplane 100.

[0084] In addition, when the outer boundary of the orthographic projection of the pixel definition layer 400 on the driving backplane 100 does not overlap with the outer boundary of the orthographic projection of the filling layer 300 on the driving backplane 100, after the organic light-emitting layer 500 and the second electrode layer 600 are subsequently formed on the side of the pixel definition layer 400 away from the driving backplane 100, it can be ensured that the portion of the organic light-emitting layer 500 and the second electrode layer 600 distributed in the pixel opening K is relatively flat, so as to ensure that the overall step difference of the portion of the organic light-emitting layer 500 and the second electrode layer 600 distributed in the pixel opening K is relatively small, thereby making the thickness of the portion of the organic light-emitting layer 500 located in the central area of ​​the pixel opening K approximately equal to the thickness located in the peripheral area of ​​the pixel opening K. In this way, the uniformity of light emission of each light-emitting device in the display panel 000 can be ensured to be high.

[0085] Optional, such as Figure 5 and Figure 6 As shown, each first electrode 210 in the first electrode layer 200 may include: a first sub-electrode 201, a second sub-electrode 202 and a third sub-electrode 203 stacked in a direction perpendicular to and away from the driving substrate 100. Here, the main material of the first sub-electrode 201 is titanium or titanium nitride, and the first sub-electrode 201 is used to enhance the adhesion between the second sub-electrode 202 and the driving backplane 100; the main material of the second sub-electrode 202 is aluminum or silver, and the second sub-electrode 202 is used to reflect the light emitted by the organic light-emitting layer 400 in the direction toward the driving backplane 100, so that the reflected light can be emitted in the direction away from the driving backplane 100, and the reflected light can produce a coherent effect with the light emitted by the organic light-emitting layer 400 in the direction away from the driving backplane 100, thereby producing a coherently enhanced microcavity effect, and improving the light output rate of the display panel 000. The main material of the third sub-electrode 203 is indium tin oxide or indium zinc oxide. The third sub-electrode 203 made of indium tin oxide or indium zinc oxide can improve the work function of the second sub-electrode 202 with reflective performance, which is beneficial to improving the electrical performance of the first electrode 210.

[0086] In this application, if Figure 5 and Figure 6 As shown, the driving backplane 100 has an insulating layer 110 on one side facing the first electrode layer 200. The insulating layer 110 has a plurality of through holes G corresponding to the plurality of first electrodes 210 one by one, and each first electrode 210 can be electrically connected to the driving backplane 100 through the corresponding through hole G.

[0087] In the embodiment of the present application, when the side of the filling layer 300 away from the driving back plate 100 protrudes beyond the side of the first electrode layer 200 away from the driving back plate 100, there are multiple design methods for making the side of the filling layer 300 away from the driving back plate 100 a plane parallel to the driving back plate 100. The embodiment of the present application takes the following two design methods as examples for explanation:

[0088] In a first design method, the side of the filling layer 300 facing away from the driving back plate 100 is directly ground flat.

[0089] For example, Figure 4 As shown, due to the over-engraving problem in the process of preparing the first electrode layer 200 in the display panel 100, the insulating layer 110 in the display panel 000 has a groove O on one side facing the first electrode layer 200. A portion of the filling layer 300 in the display panel 000 may be located in the groove O. Here, the orthographic projection of the groove O of the insulating layer 110 on the driving backplane 100 may be located between the orthographic projections of two adjacent first electrodes 210 on the driving backplane 100. For example, the orthographic projection of the groove O on the driving backplane 100 may surround the periphery of the orthographic projections of each first electrode 210 on the driving backplane 100.

[0090] In addition, since the concentration of the etching solution distributed in different regions is different during the over-etching process, the depths of the grooves O formed on the insulating layer 110 in different regions are different. In this case, in order to ensure that the side of the filling layer 300 away from the driving backplane 100 is parallel to the plane of the driving backplane 100, the thickness of the filling layer 300 can be thickened, that is, it is necessary to ensure that the side of the formed filling layer 300 away from the driving backplane 100 protrudes from the side of the first electrode layer 200 away from the driving backplane. The portion of the filling layer 300 protruding from the first electrode layer 200 can be polished so that the side of the filling layer 300 away from the driving backplane 100 is parallel to the plane of the driving backplane 100, and then the pixel definition layer 400 can be formed on the side of the flat and uniform filling layer 300 away from the driving backplane.

[0091] The second design method is to improve the preparation process of the first electrode layer 200 so that the side of the insulating layer 110 facing the first electrode layer 200 no longer forms the groove O. Under this premise, the side of the filling layer 300 facing away from the driving backplane 100 is polished.

[0092] For example, Figure 7 As shown in FIG. 1 , a layer of photoresist film 700a is first coated on the side of the insulating layer 110 away from the driving backplane 100. Then, as shown in FIG. Figure 8As shown, the photoresist film 700a can be exposed and developed to obtain a patterned photoresist pattern 700b. Here, the orthographic projection of the photoresist pattern 700b on the driving backplane 100 can surround the periphery of the orthographic projection of each light-emitting device formed subsequently on the driving backplane. Fig. 9 As shown, a metal conductive film 200a is formed on the side of the photoresist pattern 700b away from the driving backplane 100. Here, a portion of the metal conductive film 200a is located on the side of the photoresist pattern 700b away from the driving backplane 100, and the orthographic projection of the other portion of the metal conductive film 200a on the driving backplane 100 does not overlap with the orthographic projection of the photoresist pattern 700a on the driving backplane 100. Finally, as Fig.10 As shown, the photoresist pattern 700b is stripped, and at this time, the portion of the metal conductive film 200a located on the side of the photoresist pattern 700b away from the driving backplane 100 will be stripped along with the photoresist pattern 700b, so that the portion of the metal conductive film 200a that does not overlap with the photoresist pattern 700a can be retained, and finally the first electrode layer 200 is formed. In this case, there is no need to use a solution for over-engraving the first electrode layer 200, so that the side of the insulating layer 110 facing the first electrode 210 will no longer form the groove O, that is, the side of the insulating layer 110 facing the first electrode 210 can be a plane parallel to the driving backplane 100. In this way, the flatness of the film layer formed subsequently can be effectively improved.

[0093] In adopting Figures 7 to 10 The process flow shown in FIG. 1 is used to prepare the first electrode layer 200, and after the filling layer 300 and the pixel definition layer 400 are subsequently formed, the process flow can be referred to as follows. Fig.11 The display panel shown. Fig.11 As shown, Fig.11 2 is a partial cross-sectional schematic diagram of another display panel provided by an embodiment of the present application. Since the groove O is no longer formed on the side of the insulating layer 110 facing the first electrode 210, the flatness of the filling layer 300 formed on the driving backplane 100 is relatively high. In this way, in the process of grinding the side of the filling layer 300 away from the driving backplane 100, the thickness of the part of the filling layer 300 that is ground and removed can be relatively small, thereby simplifying the difficulty of grinding the filling layer 300.

[0094] In this application, in a possible implementation, please refer to Fig.12 , Fig.12: is a partial cross-sectional schematic diagram of a display panel provided by another embodiment of the present application. The side of the portion of the filling layer 300 covering the edge of the first electrode 210 close to the pixel opening K is an inclined surface, and the angle between the inclined surface and the side of the filling layer 300 covering the edge of the first electrode 210 facing the first electrode 210 is an acute angle. In this way, the portion of the second electrode layer 600 located in the pixel opening K close to the pixel definition layer 400 is relatively flat, so as to ensure that the overall step difference of the portion of the second electrode layer 600 distributed in the pixel opening K is relatively small, reducing the possibility of the second electrode layer 600 being disconnected.

[0095] In another possible implementation, see Fig.13 , Fig.13 4 is a partial cross-sectional schematic diagram of another display panel provided by another embodiment of the present application. The side of the third definition layer 430 close to the pixel opening K is an inclined surface, and the angle between the inclined surface and the side of the third definition layer 430 facing the driving backplane 100 is an acute angle. In this way, the portion of the second electrode layer 600 located in the pixel opening K close to the pixel definition layer 400 is relatively flat, so as to ensure that the overall step difference of the portion of the second electrode layer 600 distributed in the pixel opening K is relatively small, thereby reducing the possibility of the second electrode layer 600 being disconnected.

[0096] It should be noted that the grinding process for the side of a certain film layer away from the driving backplane mentioned in the above embodiment means: using a chemical mechanical grinding process or a back-etching process to process the side of the film layer away from the driving backplane, that is, the side of the film layer away from the driving backplane is processed into a plane parallel to the driving backplane. Exemplarily, grinding the side of the first definition layer away from the driving backplane means: using a chemical mechanical grinding process or a back-etching process to process the side of the first definition layer away from the driving backplane.

[0097] It should also be noted that the multiple stacked inorganic insulating layers in the pixel definition layer in the embodiment of the present application are obtained by a single patterning process. For example, when the pixel definition layer includes a stacked third definition layer, a first definition layer, and a second definition layer, three inorganic insulating films can be formed in sequence, and then a single patterning process can be performed on the three inorganic insulating films to obtain a stacked third definition layer, a first definition layer, and a second definition layer. Here, a single patterning process may include: photoresist coating, exposure, development, etching, and photoresist stripping.

[0098] In summary, the display panel provided by the embodiment of the present application includes: a driving backplane, a first electrode, a filling layer, a pixel definition layer, an organic light-emitting layer and a second electrode layer. Among them, the pixel definition layer has a plurality of pixel openings and the sidewalls of the pixel openings have a concave structure. The distance between the side of the filling layer away from the driving backplane and the driving backplane is greater than or equal to the distance between the side of the first electrode layer away from the driving backplane and the driving backplane, ensuring that the flatness of the side of the filling layer away from the driving backplane is relatively high. To this end, the concave structure is distributed on the side of the filling layer away from the driving backplane, which can ensure that the distribution positions of the concave structures distributed on the sidewalls of each pixel opening are basically consistent, so as to ensure that the concave structures set on the sidewalls of each pixel opening have basically the same partition effect on the organic light-emitting layer. In this way, at least part of the orthographic projection of the concave structure on the driving backplane may not overlap with the orthographic projection of the first electrode on the driving backplane, that is, at least part of the orthographic projection of the concave structure on the driving backplane is located outside the orthographic projection of the first electrode on the driving backplane. Thus, the area of ​​the first electrode covered by the concave structure on the side wall of the pixel opening is smaller, so that the connection area between the first electrode and the organic light-emitting layer is increased, which can effectively improve the aperture ratio of the display panel and thus improve the display effect of the display panel.

[0099] The embodiment of the present application also provides a display device. The display device can be any product or component with a display function, such as AR, VR, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc. The display device can include a driver chip and a display substrate. The display substrate can be a silicon-based OELD display substrate.

[0100] In the embodiment of the present application, the display substrate may be the display substrate in the above embodiment. Figures 2 to 13 The display substrate is shown. The display substrate is connected to a driving chip, and the driving chip provides an electrical signal to the display substrate so that the display substrate can display an image.

[0101] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0102] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0103] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: A driving backplane (100), a first electrode layer (200), a filling layer (300), a pixel definition layer (400), an organic light-emitting layer (500) and a second electrode layer (600); The first electrode layer (200) is located on one side of the driving backplane (100), the first electrode layer (200) has a plurality of first electrodes (210) that are separately arranged, and the first electrodes (210) are electrically connected to the driving backplane (200); The filling layer (300) is located on a side of the driving backplane (100) where the first electrode layer (200) is arranged, and is distributed between two adjacent first electrodes (210); The pixel definition layer (400) is located on a side of the filling layer (300) away from the driving backplane (100), the pixel definition layer (400) has a plurality of pixel openings (K), and the side walls of the pixel openings (K) have a concave structure (N); The organic light-emitting layer (500) is located on a side of the pixel definition layer (400) away from the driving backplane (100); The second electrode layer (200) is located on a side of the organic light-emitting layer (500) that is away from the driving backplane (100); The distance between the driving back plate (100) and a side of the filling layer (300) facing away from the driving back plate (100) is greater than or equal to the distance between the driving back plate (100) and a side of the first electrode layer (200) facing away from the driving back plate (100); the orthographic projection of the concave structure (N) on the driving back plate (100) overlaps with the orthographic projection of the filling layer (300) on the driving back plate (100), and the orthographic projection of the concave structure (N) on the driving back plate (100) is at least located outside the orthographic projection of the first electrode (210) on the driving back plate (100).

2. The display panel according to claim 1, characterized in that: The driving back plate (100) has a groove (O) on one side facing the first electrode layer (200), the groove (O) being distributed between orthographic projections of two adjacent first electrodes (210) on the driving back plate (100), and the groove (O) comprising at least two first sub-grooves (O1) and second sub-grooves (O2) distributed in different areas, the depth of the first sub-groove (O1) being greater than the depth of the second sub-groove (O2); The distance between the side of the filling layer (300) facing away from the driving back plate (100) and the bottom surface of the first sub-groove (O1) is greater than the distance between the side of the filling layer (300) facing away from the driving back plate (100) and the bottom surface of the second sub-groove (O2).

3. The display panel according to claim 2, characterized in that: For any one of the first electrodes (210), the side of the filling layer (300) distributed around the first electrode (210) facing away from the driving back plate (100) is flush, and the side of the filling layer (300) facing away from the driving back plate (100) is a plane parallel to the driving back plate (100).

4. The display panel according to claim 1, characterized in that: The orthographic projection of the concave structure (N) on the driving back plate (100) does not overlap with the orthographic projection of the first electrode (210) on the driving back plate (100).

5. The display panel according to claim 1, characterized in that: When the distance between the side of the filling layer (300) facing away from the driving backplane (100) and the driving backplane (100) is greater than the distance between the side of the first electrode layer (200) facing away from the driving backplane (100) and the driving backplane (100), the filling layer (300) covers the edge portion of the first electrode (210), and the orthographic projection of the pixel definition layer (400) on the driving backplane (100) is located within the orthographic projection of the filling layer (300) on the driving backplane (100).

6. The display panel according to claim 5, characterized in that: The outer boundary of the orthographic projection of the pixel definition layer (400) on the driving backplane (100) does not overlap with the outer boundary of the orthographic projection of the filling layer (300) on the driving backplane (100).

7. The display panel according to claim 5, characterized in that: The orthographic projection of the pixel definition layer (400) on the driving backplane (100) does not overlap with the orthographic projection of the first electrode (210) on the driving backplane (100).

8. The display panel according to any one of claims 1 to 7, characterized in that: The display panel further comprises: an insulating layer (700), the insulating layer (700) being located on a side of the driving backplane (100) facing the first electrode layer (200), the filling layer (300) and the first electrode layer (200) being located on a side of the insulating layer (700) facing away from the driving backplane (100), and the insulating layer (700) having a plurality of through holes (G) corresponding one-to-one to the plurality of first electrodes (210), and the first electrodes (210) being electrically connected to the driving backplane (100) through the corresponding through holes (G); The side of the insulating layer (700) facing away from the driving backplane (100) is a plane parallel to the driving backplane (100), or the side of the insulating layer (700) facing away from the driving backplane (100) has a groove (O), a portion of the filling layer (700) is located in the groove (O), and the orthographic projection of the groove (O) on the driving backplane (100) is located between the orthographic projections of two adjacent first electrodes (210) on the driving backplane (100).

9. The display panel according to any one of claims 1 to 7, characterized in that: The pixel definition layer (400) comprises a first definition layer (410) and a second definition layer (420) stacked in a direction perpendicular to and away from the drive substrate (10), and the pixel opening (K) sequentially penetrates the second definition layer (420) and the first definition layer (410); The orthographic projection of the first definition layer (410) on the driving backplane (100) is located within the orthographic projection of the second definition layer (420) on the driving backplane (100), and the outer boundary of the orthographic projection of the first definition layer (410) on the driving backplane (100) does not overlap with the outer boundary of the orthographic projection of the second definition layer (420) on the driving backplane (100).

10. The display panel according to claim 9, characterized in that: The side of the first definition layer (410) facing away from the driving back plate (100) and the side of the second definition layer (420) facing away from the driving back plate (100) are both parallel to the plane of the driving back plate (100).

11. The display panel according to claim 9, characterized in that: The pixel definition layer (400) further comprises: a third definition layer (430), the third definition layer (430) being located on a side of the first definition layer (410) facing the driving backplane (100), and the pixel opening (K) also passes through the third definition layer (430); The orthographic projection of the first definition layer (410) on the driving backplane (100) is located within the orthographic projection of the third definition layer (430) on the driving backplane (100), and the outer boundary of the orthographic projection of the first definition layer (410) on the driving backplane (100) does not overlap with the outer boundary of the orthographic projection of the third definition layer (430) on the driving backplane (100).

12. The display panel according to claim 11, characterized in that: The orthographic projection of the third definition layer (430) on the driving backplane (100) does not overlap with the orthographic projection of the first electrode (210) on the driving backplane (100).

13. The display panel according to claim 11, characterized in that: In a direction parallel to the driving back plate (100), the width of the portion of the third definition layer (430) protruding outward relative to the first definition layer (410) is greater than or equal to the width of the portion of the second definition layer (420) protruding outward relative to the first definition layer (410).

14. The display panel according to any one of claims 11 to 13, characterized in that: A surface of the third definition layer (430) facing away from the driving back plate (100) is a plane parallel to the driving back plate (100).

15. A display device, characterized in that: include: A driving chip and a display panel, wherein the display panel is the display panel according to any one of claims 1 to 14, and the driving chip is used to apply a driving signal to the display panel.

Images